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模拟滤波器的传递函数

Wolfram Language code: Manipulate[Chop@TransferFunctionExpand[filter[n, s]], {{n, 2, "filter order"}, 2, 8, 1, Appearance -> "Labeled"}, {{filter, ButterworthFilterModel}, {ButterworthFilterModel -> *"Butterworth"*, Chebyshev1FilterModel -> *"Chebyshev 1"*, Chebyshev2FilterModel -> *"Chebyshev 2"*, EllipticFilterModel -> *"elliptic"*}}, SaveDefinitions -> True]